We Are Ophthalmology LTD We Care About Your Health

Over the years, Ophthalmology LTD's name has become associated with the highest quality of comprehensive medical and surgical eye care. Highly trained ophthalmologists David West, Bryan Hammer, Gregory Osmundson, Eric Thomas, Dustin Dierks, Ryan Geraets, Michael Eide, Elizabeth Atchison, and Elise In’t Veld, as well as experienced optometrists Andrea McCann and Emily Walters combine their considerable expertise to give each and every patient the best possible care. Ophthalmology LTD delivers treatment for cataracts, glaucoma, diabetic eye disease, as well as cornea transplants, oculoplastic surgery, retina surgery, vitreoretinal surgery, and pediatric eye care in Sioux Falls.

The Finest Eye Specialists in the Tri-State Area

Ophthalmology LTD brings the finest eye specialists in South Dakota to satellite offices in the tri-state area: Luverne, Pipestone, Worthington and Windom in Minnesota, Rock Valley, Sibley, and Sioux Center in Iowa, as well as Dell Rapids, Madison, Mitchell, and Yankton in South Dakota.


In 1968, Ophthalmology LTD revolutionized eye care by taking a comprehensive approach, bringing patients a full range of vision specialties under one roof. Today, eye care teams across the nation are now mimicking the strategy we have spent more than 50 years perfecting. It is because of this experience and our genuine dedication to our patients that our team is widely considered the finest, most comprehensive group of sub-specialty eye surgeons in the tri-state Siouxland area.

Our Services

Our ophthalmologists have expertise in a wide range of specialties and work as a team to meet your eye care needs.


Not only is cataract treatment the most frequently performed surgery in the United States, it is also one of the most successful. More than 99% of patients who undergo cataract removal rank their vision as significantly improved. Drs. Osmundson, Hammer, Dierks, Eide, In't Veld, and West perform this highly effective procedure.

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Early detection and treatment is the key to preventing vision loss with Glaucoma. More than three million Americans have glaucoma, but only half are actually aware that this "silent thief" is slowly and without warning stealing away their vision, sometimes without any noticeable symptoms. Drs. Osmundson and In't Veld  at Ophthalmology LTD specializes in the diagnosis and treatment of glaucoma.

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Children should have a yearly comprehensive eye exam along with their parents. Many vision problems can be detected early and treated before they become detrimental to a child's development, learning abilities, and every day function. Dr. West of Ophthalmology LTD has 22 years of experience in the evaluation and treatment of children's vision.

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The retina functions much like the film in a camera, and when film is damaged, so is the picture. Our retinal specialists Drs. Geraets, Thomas, and Atchison  offer comprehensive retinal exams and treatment to protect against diseases such as diabetic retinopathy that can damage your retina and vision.

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If a window pane is distorted or marred by imperfections, it is difficult to see out through it clearly. Your cornea is your eye’s window. To keep it clear or to restore it to its proper state, Dr. Eide of Ophthalmology LTD uses his specialty training in corneal diseases to treat dry eye, keratoconus, and other conditions that can cause corneal imperfections.

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When your eyelids, eye sockets, or tear ducts malfunction, or a tumor threatens your vision, Ophthalmology LTD oculoplastic surgeon Dr. Hammer can help. Specializing in procedures that restore clear vision as well as a more youthful appearance, Dr. Hammer treats and manages a wide variety of ocular conditions.

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We are a team of passionate professionals with
caring for patients in South Dakota, Minnesota, & Iowa.

Have a look around, then call, request an appointment online, or come by to learn more about how our team of eye experts can help you and your family.

  • Ruth K.

    I’ve been very pleased with Ophthalmology LTD. I’ve been going there for a few years and am so impressed with how everyone treats me with total respect. Dr. Brian Hammer and his staff are very professional and thorough in explaining... read more

  • Charleen F.

    Dr West and his staff are great.
    Everything is explained to where you totally understand. Had some issues that I wasn't sure what was happening with my vision, was able to get appt. immediately and get some much needed answers. So...
    read more

  • alan k.

    Great place to have your cataracs done. They did my left eye in 2015 and now I am back for my right eye. Other places make you go to the hospital and pay that added expence. Ophthamology Ltd does it... read more

  • Valeria W.

    I was misdiagnosed with glaucoma and would have never known had I not scheduled an appointment with Dr. In't Veld, a specialist in the disease. It was a big relief to know I definitely don't have glaucoma, and definitely worthwhile.

  • Ray H.

    Dr. Eide has my best interests first. He explains findings thoroughly and I am glad he is my eye doctor!

  • Oscar A.

    My Doctor took her time with me and explained everything to me. My work up was very thorough, and I was very comfortable with the staff

  • Cindy S.

    Dr. Osmondson has been treating my glaucoma for over 5 years. Never, ever on any of my appointments was i rushed along rushed or looked over. He and his staff and caring, kind and still professional.

  • Mary M.

    treated very well. Always polite and professional

  • CharlienCindy B.

    Knowledgeable staff Willing to meet your needs

  • Lois L.

    They provide fast and friendly service!

  • Tom B.

    Long wait. Very professional procedure. I was pleased.

  • gary u.

    Great People & service!

  • Rae C.

    They are very caring and take time with their patients.

  • Margaret S.

    I have total confidence in Dr. Osmondson. I trust his decisions and feel good about them when I walk out the door. Very organized staff

  • Peggy M.

    Very professional, and all the staff were so nice.

  • Cecilia B.

    Kind, professional and answered all my questions

  • Kay K.

    The doctors are very knowledgeable & it is easy to get an appointment. I have been a patient there for a long time & highlyvrecommend Opthalmology Ltd.

  • Susan R.

    Dr. McCann is a wonderful doctor. She’s very pleasant has a wonderful bedside manner and very personable along with being very professional. I always feel like I’m going in to see a friend not just a doctor.. I highly recommend... read more

  • Sheila R.

    Professionally managed, well organized, and extremely competent are the terms I would use to describe this practice. I will definitely return.

  • Carolyn M.

    This was my first time at ophthalmology LTD. I had a very positive experience and a very good feeling about the practice in general. Very competent and friendly staff and I feel quite confident with Dr. Derks as... read more

  • Pat A.

    Wonderful experience. Professional, friendly staff that put you at ease. Dr. Dierks is a competent, caring ophthalmologist, who always seems to have the time to answer questions. Highly recommend

  • Jay G.

    The whole staff is friendly, low wait times!

  • Audi A.

    Hi, everything was fine! See you in a year!

  • Debbie C.

    Dr Hammer and his associates are professional, caring and personable. They are very well educated in their profession and listen carefully to your concerns and provide several wonderful options that work best for you. I highly recommend Dr. Hammer and... read more

  • PamandDean L.

    From the moment one opens the door... everyone is so accommodating and friendly!!! Very kind, informative and passionate about what they do for their patients!

  • Cheryl S.

    they are always Friendly and take good care of me when I am there

  • Wally B.

    As a first time patient I found the staff to be very friendly and my Doctor was Elisabeth Atchison who was very informative and also very professional All receive a 5 star ratingWally Brownlee

  • Cecil W.

    The curtious service and efficient manner which they did their jobs

  • Audrey H.

    The team members at Ophthalmology Ltd. are all very friendly and helpful. Dr. Walters and her nurse answered all my questions and took all the time I needed. I was not rushed in and out, but treated with respect and... read more

  • Daniel H.

    Staff is friendly checking in. The wait was minimal. Beautiful building. Dr. Walters assistant was very personable, accommodating and professional. She did an excellent job of doing the tests necessary prior to Dr. Walters evaluating her results and conducting... read more

  • Gary a.

    Very thourgh and plesent personality

  • Dennis T.

    Ophthalmology LTD has a great team of professionals, Staff and Doctors. Have been a patient for the last 6 years and have total trust in the care they provide. My recent visit was with Dr. McCaan, OD, she makes you... read more

  • Clayton D.

    They are kind and straight to the point and if you don’t understand they reword it so you do.

  • Jose G.

    Very Friendly-professional personnel. I was having an important training at work and requested a special treatment to be able to recover my eyes as soon as possible and they used a softer reactive on my eyes. Instead of 4 hours... read more

  • Jaye W.

    Dr. McCann was, as always, professional, thorough, kind, courteous and friendly. I never feel rushed through even when it's very busy in the office. She always takes the time to make me feel well cared for!

  • Randy F.

    Very professional!! Wonderful experience and appreciate that they fit me in. Dr Geraets explained my surgery process very well. Thank you all so much!

  • Sandra K.

    I was very impressed with the professional staff and their compassionate attitude. I felt well cared for and had a very thorough explanation of the exam.

  • Brian D.

    Very professional and squeezed me in for laser eye surgery.

  • Kristina C.

    I have been going to Dr. Walters for the last 4 or 5 years. I’ve had glasses since I was 19 and all the eye doctors before her told me I had an astigmatism. When I saw her the first... read more

  • Deb W.

    Dr McCann was wonderful to work with. She was professional yet very personable. She was very thorough, answered all my questions, and made me feel very much at ease. I was very comfortable talking to her and left feeling that... read more

  • Bobby A.

    The staff and doctors all friendly Experience I had was great I would recommend autumn ology to friends family And other people

  • Marjorie M.

    The doctor was kind and answered any questions I had. Enjoyed meeting him.

  • Paula R.

    From the moment I arrived at Ophthalmology Ltd., the front desk staff, to the nurse that assessed me, to my eye exam with Dr. Emily Walters, I knew I had found the best! Everyone was so welcoming, kind, knowledgeable, professional... read more

  • Marvin V.

    Professional thorough and compassionate. I highly recommend them. Dr. Emily Walters is great to have on your side.

  • Gary B.

    I have been Doctoring for deterioration of my vision for sometime and I think I have finally found someone that I think can halo me.
    Thank you

  • Bonnie T.

    They are very helpful and professional.

  • Dan P.

    the whole staff is very friendly and very competent.
    over the years I have had multiple tears and a detached retina. perfect results on all procedures. They give continual monitoring and stay on top of any changes. I can't...
    read more

  • Pat F.

    I had my annual eye exam with Dr. West yesterday as a follow-up for an optic nerve problem.
    It was and always is a prompt appointment and the staff and Dr. West are exceptionally personable.
    My experiences over the last five years...
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  • Sean B.

    A longer wait than normal but my doctor apologized as they were shortstaffed and she did reassure me about my vision. Will return again next year because they always do a thorough job.

  • Larry O.

    Managed to fit me in with very little notice. Everyone I came in contact with was very knowledgeable and very pleasant.